On Tue, 18 Jun 2002, Dieter Maurer wrote:

> Wei He writes:
>  > ...
>  > 2. From the website developers' point of view, there are already many 
>  > guidlines on how to create a good webpage. Among them are using the HTTP 
>  > Last-modification header to take the advantages of client cache.
> I think you overestimate the importance of accurate "Last-Modified"
> headers.

Perhaps. But I think Etag, If-Modified-Since or whatever headers only 
make sense to a cache server that is designed to use these values, not
for a generic one or the end users browser clients. And the last one is 
the real place caching-related headers making sence to.

If I understand correctly, the Expires header can only give the 
client an impression how ofter a page is updated. 

> I would use "Expires" and "Cache-Control" for cache control.
Only when you want to disable the cache function, can these two headers be 

Wei He

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